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オクノ ショウジ
Okuno Shoji 奥野 祥二 所属 神奈川大学 情報学部 システム数理学科 職種 助教 |
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言語種別 | 日本語 |
発行・発表の年月 | 2003/12 |
形態種別 | 学術雑誌 |
査読 | 査読あり |
標題 | Measurement of Time-Dependent CP-Violating Asymmetries in B0 → φ K0S, K+K-K0S, and η'K0S Decays |
執筆形態 | 共著 |
掲載誌名 | Phys. Rev. Lett. 91, 261602 (2003) (6 pages) |
著者・共著者 | K. Abe, S. Okuno et al. [The Belle Collaboration] |
概要 | We present an improved measurement of CP-violation parameters in B0 → φ K0S, K+K-K0S, and η'K0S decays based on a 140 fb-1 data sample collected at the υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. We find that the observed CP asymmetry in the B → φ K0S decay differs from the standard model (SM) expectation by 3.5 standard deviations, while the other cases are consistent with the SM. ,BELLE-66. |